Applications

Low-cost
Video Monitoring

ENG/SNG Setup and Monitoring

Remote Microwave
and Transmitter Monitoring

PAL color bars waveform display.

Line
select display.

NTSC
vector display.

The Tektronix WVR500 Waveform/Vector
Rasterizer is a one-half rack width, one rack unit high device that provides
a compact and economical solution for monitoring the waveform and color vector
display of an NTSC or PAL television signal. The waveform or vector is displayed
on a standard NTSC or PAL picture monitor, either full-screen or cut into
the picture display. A signal may be displayed locally or at remote locations
within reach of a video circuit. The WVR500 provides the composite NTSC or
PAL signal monitoring features expected in a two input combination waveform/vector
monitor, including flat and filtered waveform displays in 1H, 2H, and field
rate sweeps, H & V magnification, full field or line selected.

NTC7
Composite test signal display.

Waveform and vector displays
cut into picture.

Magnified
display of 2T and modulated 12.5T pulses.

The vector
display may be rotated or magnified. Either waveform or vector may be displayed
on an existing picture monitor full screen, and one or both may be cut into
the color picture. The output of the WVR500 is NTSC or PAL and may be routed
to a remote picture monitor via standard video circuits.

WVR500 output may be routed into
any signal monitoring path. (Video courtesy of KGW-TV, Portland, Oregon.)

The
display quality of the WVR500 is outstanding. There is no processing of the
picture video passed through the unit. All graticules are electronically generated
for maximum clarity. Waveform and vector displays utilize a Tektronix-developed
rasterizing technology and exhibit much of the look and clarity of a conventional
electrostatic CRT. Particular attention has been paid in the development of
this new technology to retaining display fidelity with both live video and
video test signals.

The compact size of the WVR500 allows mounting
at the operator position with a minimum of panel space. The rasterizer may
be connected via a single video feed to a picture monitor or may be installed
in a routing system for display through any signal monitoring path.

The
WVR500 waveform/vector rasterizer is used in applications where monitoring
is desired, but previously not possible due to distance between the monitoring
connection and the operator. Typical applications include remote monitoring
of VTRs, satellite uplinks/downlinks, and remote microwave and transmitter
sites where a return video link is available.

The WVR500 is ideal for
cable, network, telephone company and satellite video operating centers where
many feeds are simultaneously monitored using continuity picture monitors.
A questionable feed may be quickly checked for proper video level, hum, tilt
or interference. Using the cut-in waveform feature, the operator can easily
confirm he is checking the desired signal.

In the production control
room, the WVR500 may be assigned with the routing switcher, providing waveform
and vector monitoring on-demand for many production sources. Simultaneous
observation of creative effects and technical signal parameters is now straightforward.

Using
the WVR500, compact production systems and news-feed vans can now have high
quality waveform and vector monitoring functions with a minimum of additional
rack space. Systems operating across international borders will find menu
selection of PAL or NTSC and operation on a wide range of AC mains voltages
convenient.

WVR500
Front Panel.

WVR500
Rear Panel.

In technical education and video training,
the WVR500 allows display on large classroom monitors. Now both the instructor
and students can see and understand the same display.

The WVR500 is
intended to be permanently connected into a system. While not specifically
designed for desktop video or one-man electronic field production applications,
it will be valuable in setting up and operating such applications when a conventional
waveform monitor is not available.

Characteristics

Vertical
Deflection System (1.0 v signal, x1 Gain)

Frequency Response -

FLAT:
50 kHz to 6 MHz within 2% of response at 50 kHz.

LOW PASS: ≥30 dB attenuation
@ 4.0 MHz.

Transient Response (2T pulse or 2T bar) -

Preshoot:
≤1%.

Pulse-to-bar ratio: 0.99:1 to 1.01:1.

Overshoot: ≤2%.

Ringing:
≤2%.

Tilt: Field rate square wave or 25 µs bar, ≤1%.

Overscan:
≤2% variation in baseline of 700 mV 20T modulated pulse as it is positioned
over the middle 80% of screen.